import auth from '@/plugins/auth'
import router, { constantRoutes, dynamicRoutes } from '@/router'
import { getRouters } from '@/api/menu'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView'
import InnerLink from '@/layout/components/InnerLink'

// 匹配views里面所有的.vue文件
const modules =
    import.meta.glob('./../../views/**/*.vue')

const usePermissionStore = defineStore(
    'permission', {
        state: () => ({
            routes: [],
            addRoutes: [],
            defaultRoutes: [],
            topbarRouters: [],
            sidebarRouters: []
        }),
        actions: {
            setRoutes(routes) {
                this.addRoutes = routes
                this.routes = constantRoutes.concat(routes)
            },
            setDefaultRoutes(routes) {
                this.defaultRoutes = constantRoutes.concat(routes)
            },
            setTopbarRoutes(routes) {
                this.topbarRouters = routes
            },
            setSidebarRouters(routes) {
                this.sidebarRouters = routes
            },
            // 清除路由
            clearRoutes() {
                this.addRoutes = []
                this.routes = []
                this.defaultRoutes = []
                this.topbarRouters = []
                this.sidebarRouters = []
            },
            generateRoutes(roles) {
                return new Promise(resolve => {
                    // 向后端请求路由数据
                    getRouters().then(res => {
                        const sdata = JSON.parse(JSON.stringify(res.data))
                        const rdata = JSON.parse(JSON.stringify(res.data))
                        const defaultData = JSON.parse(JSON.stringify(res.data))
                        const sidebarRoutes = filterAsyncRouter(sdata)
                        const rewriteRoutes = filterAsyncRouter(rdata, false, true)
                        const defaultRoutes = filterAsyncRouter(defaultData)
                        const asyncRoutes = filterDynamicRoutes(dynamicRoutes)
                        
                        // 添加路由名称检查和去重逻辑
                        const processedRoutes = processRoutesForDuplicates(rewriteRoutes)
                        
                        asyncRoutes.forEach(route => { router.addRoute(route) })
                        this.setRoutes(processedRoutes)
                        this.setSidebarRouters(constantRoutes.concat(sidebarRoutes))
                        this.setDefaultRoutes(sidebarRoutes)
                        this.setTopbarRoutes(defaultRoutes)
                        resolve(processedRoutes)
                    })
                })
            }
        }
    })

// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
    return asyncRouterMap.filter(route => {
        if (type && route.children) {
            route.children = filterChildren(route.children)
        }
        if (route.component) {
            // Layout ParentView 组件特殊处理
            if (route.component === 'Layout') {
                route.component = Layout
            } else if (route.component === 'ParentView') {
                route.component = ParentView
            } else if (route.component === 'InnerLink') {
                route.component = InnerLink
            } else {
                route.component = loadView(route.component)
            }
        }
        if (route.children != null && route.children && route.children.length) {
            route.children = filterAsyncRouter(route.children, route, type)
        } else {
            delete route['children']
            delete route['redirect']
        }
        return true
    })
}

function filterChildren(childrenMap, lastRouter = false) {
    var children = []
    childrenMap.forEach(el => {
        el.path = lastRouter ? lastRouter.path + '/' + el.path : el.path
        if (el.children && el.children.length && el.component === 'ParentView') {
            children = children.concat(filterChildren(el.children, el))
        } else {
            children.push(el)
        }
    })
    return children
}

// 动态路由遍历，验证是否具备权限
export function filterDynamicRoutes(routes) {
    const res = []
    routes.forEach(route => {
        if (route.permissions) {
            if (auth.hasPermiOr(route.permissions)) {
                res.push(route)
            }
        } else if (route.roles) {
            if (auth.hasRoleOr(route.roles)) {
                res.push(route)
            }
        }
    })
    return res
}

export const loadView = (view) => {
    let res
    for (const path in modules) {
        const dir = path.split('views/')[1].split('.vue')[0]
        if (dir === view) {
            res = () => modules[path]()
        }
    }
    return res
}

export default usePermissionStore

// 处理重复路由名称的函数
function processRoutesForDuplicates(routes) {
    const routeNames = new Set()
    
    function processRoute(route) {
        if (route.name) {
            // 如果路由名称已存在，添加后缀使其唯一
            let newName = route.name
            let counter = 1
            while (routeNames.has(newName)) {
                newName = `${route.name}_${counter}`
                counter++
            }
            route.name = newName
            routeNames.add(newName)
        }
        
        // 递归处理子路由
        if (route.children && route.children.length > 0) {
            route.children.forEach(child => processRoute(child))
        }
        
        return route
    }
    
    return routes.map(route => processRoute(route))
}